Terminal Shield for USB 3.0 Connector Impedance Stability
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Solution Overview
Problem
USB 3.0 connectors face issues with electromagnetic interference and impedance instability due to high-frequency signal transmission, and compatibility problems arise when connecting devices from different manufacturers.
Innovation Solution
An electrical connector with a terminal shield that shields the soldering segments of the second terminals, preventing electromagnetic interference and stabilizing impedance, thus ensuring stable high-frequency signal transmission and improved compatibility across different manufacturers' connectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If USB 3.0 connectors transmit high frequency signals to achieve 4.8 Gbps transmission speed, then transmission speed is improved, but electromagnetic interference increases and impedance stability deteriorates
Solution Approach 1:
A terminal shield structure is introduced as an intermediary component between the second terminals transmitting high-frequency signals and surrounding electronic components. This shield acts as a mediator that blocks electromagnetic interference from affecting the signal transmission, thereby enabling stable 4.8 Gbps transmission without susceptibility to external electromagnetic noise.
Solution Approach 2:
The patent converts the harmful electromagnetic interference into a controlled shielding effect by designing the terminal shield with specific grounding connections. The shield captures and redirects electromagnetic interference through controlled impedance paths to ground, transforming the harmful interference into a benign reference potential that stabilizes rather than disrupts the high-frequency signal.
2Speed
If USB 3.0 connectors transmit high frequency signals to achieve 4.8 Gbps transmission speed, then transmission speed is improved, but impedance stability deteriorates
Solution Approach 1:
The terminal shield serves as an intermediary that stabilizes the electromagnetic environment around the second terminals. By providing a controlled shielding boundary with defined impedance characteristics, the shield mediates between the high-frequency signals and the external environment, preventing impedance fluctuations that would otherwise occur due to nearby electronic components.
Solution Approach 2:
The patent applies local quality enhancement by adding the terminal shield specifically around the second terminals that require high-frequency signal transmission, rather than uniformly shielding the entire connector. This localized shielding approach optimizes impedance stability precisely where needed for USB 3.0 functionality while maintaining compatibility with USB 2.0 terminals.
3Manufacturing precision
If USB 3.0 receptacle connector is designed to pass impedance test with self-made plug connector, then manufacturing precision is improved, but adaptability to other manufacturers' connectors deteriorates
Solution Approach 1:
The terminal shield design provides universal adaptability by implementing a standardized shielding structure that maintains consistent impedance characteristics across different manufacturing implementations. The shield's geometry and grounding scheme are designed to create a repeatable electromagnetic environment that ensures impedance test pass rates while accommodating variations in manufacturing tolerances, thereby enabling compatibility across different manufacturers' USB 3.0 connectors.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The terminal shield effectively prevents electromagnetic interference, stabilizes impedance, and enhances signal transmission efficiency, ensuring compatibility with USB 3.0 connectors from various manufacturers.
Implementation Method 1
The terminal shield substantially shields the soldering segments of the second terminals and prevents electromagnetic interference
Data Source
AI summary
An electrical connector has an insulative housing, a plurality of first terminals, a plurality of second terminals and a terminal shield. The first and second terminals are mounted in the insulative housing and each terminal has a soldering segment. The terminal shield substantially shields the soldering segments of the second terminals and prevents electromagnetic interference so that transmitting high frequency signals on the second terminals is stable.